Lamp base



FIG. 1 is a perspective view from above of a lamp base showing my new design;

FIG. 2 is a perspective view from below thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a perspective view from above of the lamp base fitted with lamp beads and a first cover in an exploded view;

FIG. 10 is a perspective view from below thereof;

FIG. 11 is a perspective view of the lamp base engaged with the first cover;

FIG. 12 is a perspective view from above of the lamp base fitted with lamp beads, a second cover, and suction cups in an exploded view; and,

FIG. 13 is a perspective view of the lamp base engaged with the second cover and suction cups.

Broken lines are for illustrative purpose only and form no part of the claimed design. 

CLAIM The ornamental design for a lamp base, as shown and described. 